What to Look for When Purchasing Composite Wood Products

Composition:  The type of timber and plastic used in composite wood products is very important.

The wood fibre type in composite wood also plays an important role. DECKO boards utilise 55% recycled hardwood and 45% recycled plastics and bonding agents.

DECKO boards are manufactured via an extrusion process, whereby all the materials are combined, heated and extruded to the desired board profile.

Colours: Most suppliers offer more than one colour and some more than five. Nearly all suppliers offer a brushed and reeded surface for their products.

Water absorption rate: Because of the nature of wood fibre, it is important that a decking board’s water absorption rate is known. Different applications will obviously necessitate different needs in terms of water absorption. The rates supplied are generally full submersion over 24 hours.

Thermal Expansion Coefficient: It is important to understand how much the boards will move, especially under Australian summer conditions. Usually it’s ‘linear expansion ratings’, which measures the change in length of the board at temperature fluctuations and therefore affects everything from board spacing to joist positioning.


Different boards require different installation methods and an important thing to look out for in the installation instructions are the materials’ expansion co-efficient.

Some boards will expand and contract as much as 1mm with every four-degree Celsius fluctuation in temperature. In this case, special screws and fixing systems are used and spacing between boards and abutting walls are larger.

The boards can be laid straight on the dirt or on the aluminium frames that are light and easy to work with. By using the aluminium structure the boards are getting extra protection, ventilation and drainage. It also prevents the boards from cupping, moving and bending.

Non-Slip Rating: For safety reasons,  especially in around the pool areas or in the uncovered areas, the non-slip rate information can affect the decision making process and choosing the the best boards for  walking on without  any safety hazards.

Warranty: All the warranties are based on residential or commercial applications. Comparison of different warranty policies can be very useful, as the longer the warranty policy is the better outcome you will have with your project in long term.